الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
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SUMIVlARYAND CONCLUSION
The present invesiiigation was carried out to determine
the effect of growth promoting substances,i.e.,
GA
3
and NAA and microwltrients applied as a foliar
spray individually and in combination at different periods
on the oehaviour of roselle growth. Therefore, two
field trials were conducted at Bahtim Agricultural Experimental
station,Agricultural Research Center using
roselle variety,namely’ Balady,in 1979 and 1980 seasons.
The design of the experiments were complete randomized
block with three replications. Plots were sprayed four
times with growth promoters and micronutrients according
to the treatments during growth period. Treatments of the
first season include GA3 100 ppm,NAA lOOppm and micronutrients,
i.e• Fe,Zn,Cu,Mn,(Fe + Zn+ Cu + Mn) and their combinations.
However, treatments of ”the second season includedGA
3
(50 and 100 ppm),NAA (25 and 50 ppm),micronutrients
(Fe + Zn + Mn + Cu + B + Mo) and their possible
combinations.
The main trend of results can be summarized as
follows:
1- NAA, GA
3
at the rate of 100 ppm increased plant
height during the growth periods of roselle. NAA + GA3
increased plant heie~t at earlier period of growth while
-- -------~-- - ---- - ----------------
descreased it at later :stages. spray of Fe or Cu increased
plant height,however,Zn,Mn and (Fe + Zn + Cu +
Mn) decreased it.
2- Stem dry weight increased gradually with advancing
plant age, reached its maximum at 125 days after sowing
then decreased through maturity.The grand p~riod of stem
growth occurred during the fourth period (100-125 days
after sowing).
3- GA
3
and NAA favoured the accumulation of stem dry
weight. The addition of micronutrients inhibited the promotive
effect of GA3 and NAA.
4- Leaves dry matter increased gradually to reach its
maximum when plants reached the age of 125 days,then
dropped. Both growth substances and micronutrients had
no effect on leaves dry matter at earlier periods of
growth but reduced it during the second period (75 days
after sowing) while enhanced such dry matter accumulation
through later periods of growth (100-125 days).
5- Dry weight.t rej)roductive organs was increased.by
GA
3
’ NAA and micronutrients. NAA at 25 ppm treatment
had the highest dry matter of such organs.
6- Dry matter accumulation in different fruit parts
of roselle was annanced by the use of GA3, NAA and micronutrients.
__ .___ __ _0’ __ --- ---- - --- _.
-- - ---- - - ------- ----------~
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7- Dry matter accumulHtion of the whole plant was favoured
by GA
3
’ NAA and micronutrients application especially
at later stages of roselle growth.
8- Leaves comprise d/’5 ~ of total dry matter of whole
plant at earlier stages of growth (50 days after sowing).
Then decreased gradu8.11Y to rea.chits lowest value through
the reproductive period.
9- Dry matter accumulation in stem increased gradually
on account of the decr1aase in leaves dry matter.
10- Growth promoting ~ubstances and micronutrients affected
the nature of regulating mechanism of dry matter
distribution and accumulation in roselle plant.
11- Both growth sUbE:tances and micronutrients had a
significant effect on bast fiber formation, especially at
later periods of grom;h.
12- The optimum duration of light period for maximum
flowering was 11.22 hrs/day. Growth substances and micronutrients
seemed to reduce number of opened flower/plant.
13- GA
3
100 ppm with Fe,Zn or ~mincreased· different
y.ield components, while with eu or (Fe + Zn + Mn + eu)
decreased such components.
14- The application of NAA + most micronutrients decreased
yield componellts of roselle plant.
- ---- -- _._-~~~--~~~~~~~~~----
- -_.--_.---- - - - - _. -- -- -_. - - -_._----
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15- NAA + GA3 at 100 ppm decreased different yield
components of roselle except fiber yield.
16- The addition of Fe or Zn beside GA3 and NAA increased
different yield components of roselle.
17- The highest stem yield of roselle was produced
by the application of GA3 100 ppm or NAA 25 ppm or micronutrients.
18- Sepals yield of roselle was increased by applying
micronutrients alone or combined with GA3
50 ppm.
19- Seed yield of roselle increased significantly by
GA3 at 50 ppm or 100 ppm + micronutrients.
20- Increasing NAA concentrations up to 50 ppm with
or without micronutrients decreased roselle seed yield.
21- Growth substances (GA3 & NAA) at both rates increased
fiber yield of roselle significantly. Such increase
was stimulated by the addition of micronutrients.
22- Oil percent in roselle seeds was not affected by
both growth substances and micronutrients.
23- The application of micronutrients·stimulated the
the accumulation of total anthocyanin in sepals of
flowers ~nd flowerbuds but slightly decreased it in mature
fruits.
24- GA3 application at both rates (50 & 100 ppm) accelerated
the anthocyanin formation in different reproduc-
-- -- --- ------- ---~
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tive organs.
25- The relative proportion of residual non-soluble
protein was the highest protein fraction in roselle
seeds.
26- The application of growth substances (GA3
& NAA)
and micronutrients increased the proportion of residual
non-soluble protein, while decreased both water soluble
and ethanol soluble protein.
27- The following amino acids were identified in the
different protein fractions of roselle seeds:
valine,8.1anine,isoleucine,glYCine,leuCine,serine,threo_
nine,aspartic aCid,glutamic,acid,lysine,arginine,histi_
dine,cystine,methionine,proline,tyrOsine and phenylalanine.
28- Proteinogenic amino acid concentrations varied greatly
with the different protein fractions.
29- Tyrosecine and cystine were absent from most protein
fractions and when present were in trace amounts.
30- Proline was found to be the dominant amino acid in
most protein fractions.
31- Proline amounts increased by the application of NAA
while GA3 decreased its concentrations •
32- GA3 and NAA enhanced the accumulation of alanine CLnd
methionine in different protein fractions.
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--” -- .- ._-._._------_ .. -- -- -------
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33- The combination of micronutrients and ~A3 or NAA
increased proline amounts in different protein fractions.
While such application decreased alanine and methionine
concerrt.ret Lon,